The polyvinylidene fluoride（ PVDF） piezoelectric film sensor with easy processing

soft

good toughness and other specialties is used as acquisition component of plantar pressure measurement system.Hardware design of the system is introduced in details. The hardware design mainly includes two parts: data acquisition and data communication. data collection part mainly consists of a charge amplifier circuit

a filtering circuit

a circuit for adjusting output; data communication part mainly consists of ATmega16 micro controller unit（ MCU） minimum system

wireless data transmission module

serial communications circuit. The experiment of plantar pressure distribution is implemented with the developed system. Through analysis on experimental data

it shows that the results is in accord with the actual condition of the plantar pressure distribution which achieves the expected design requirements.